基于正交试验的免蒸压加气混凝土的制备与性能优化  

Preparation and performance optimization of non-autoclaved aerated concrete based on orthogonal tests

作　　者：刘小荟 彭晓彤[1] 汪洪伟 李维海 王鹏[1] LIU Xiaohui;PENG Xiaotong;WANG Hongwei;LI Weihai;WANG Peng(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,China;China Railway Tenth Bureau Group Co.,Ltd.,Yantai 264001,China)

机构地区：[1]济南大学土木建筑学院,山东济南250022 [2]中铁十局集团城建工程有限公司,山东烟台264001

出　　处：《中国粉体技术》2024年第6期74-84,共11页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:12272148。

摘　　要：【目的】制备轻质高强、节能保温的免蒸压加气混凝土,寻找最优制备配合比,提高固体废弃物的利用率。【方法】基于正交试验采用极差分析和矩阵关联分析的方法确定免蒸压加气混凝土的基础最优配比,优化玻璃粉的掺入量来实现加气混凝土性能的提升。【结果】各因素对免蒸压加气混凝土的表观干密度和抗压强度的影响程度由大到小为铝粉掺量(质量分数,下同)、水泥掺量、水料比、聚丙烯纤维(PP纤维)掺量,加气混凝土的基础最优配比为水泥掺量为24%,水料比为0.44,铝粉掺量为0.13%,PP纤维掺量为0.4%;当玻璃粉质量替代率达到25%时,混凝土的综合性能达到最优。【结论】玻璃粉作为粉煤灰的替代材料,在改善免蒸压加气混凝土干密度、抗压强度、导热系数方面效果显著。Objective With the rapid progress of urbanization,energy consumption in the construction industry has become increasingly concerning.Traditional autoclaved aerated concrete,though widely used,requires high energy during production,conflicting with low-carbon and energy-saving goals.Thus,developing non-autoclaved aerated concrete with low energy consumption and good thermal insulation is a key research direction.This study also seeks to enhance the use of solid waste,particularly waste glass powder.Waste glass,difficult to degrade,poses environmental risks if improperly handled.Incorporating waste glass powder in non-autoclaved aerated concrete not only mitigates environmental pollution but also improves its properties,such as lowering thermal conductivity and increasing compressive strength.This approach aligns with sustainability goals and promotes waste recycling.The research ultimately aims to prepare lightweight,high-strength,energy-efficient,and heat-insulating nonautoclaved aerated concrete,contributing to low-carbon,eco-friendly construction.Methods In this study,orthogonal tests were conducted with two analysis approaches:range analysis and matrix correlation analysis.First,taking dry density and compressive strength as performance indicators,a L16(4^(4))orthogonal experiment was designed examining four factors:cement content,aluminum powder content,polypropylene(PP)fiber content,and watermaterial ratio.Then,range analysis method was used to determine the influence of each factor on the performance of aerated concrete.Matrix analysis was applied to calculate the comprehensive weight of different levels of each influencing factor on multiple performance indicators to determine the optimal ratio for non-autoclaved aerated concrete.In addition,different amounts of glass powder(15%,20%,25%,and 30%)were used to replace fly ash,and their effects on performance indicators such as dry density,compressive strength,and thermal conductivity were investigated.Results and Discussion Aluminum powder had the most signif

关 键 词：免蒸压加气混凝土 玻璃粉 干密度 抗压强度 导热系数 正交试验 

分 类 号：TU528[建筑科学—建筑技术科学] TB4[一般工业技术]